Steam-boiler furnace.



No. 862,730l

W. STEAM 330mm FURMQR APILIUATIH L'ILHT) MAY ifi, EEHJL 4 SHEETS-SHEET l,

zzyrso. PATENTBD AUG'. 6,'1907. V w. GRAHAM.

STEAM B-QILBR EURNACE.

APPLIUATIGN FILED MAY 14, 1901.

4 SHEBTSfSH'IIET 2 115.862.330. y I PATENTED AUG. '6,' 1907.

W.. GRAHAM. .STEAM BoILBR PURNAUE.

4APPLICATION IIILBD HAY 14, 1901.v r

4 SHEETS-SHEET 4.

enabled; to distribute the uel evenly and at WALTER GRAHAM, OF ARDMORE, PENNSYLVANIA.

STEAM-BOILER -FURNAGE.

specification of Letters Patent. Application filed May 14,1801. Serial No. 60,168.

Patented Aug. o, v19o?. l

To all, whfm it may-concern: l '1 Be it -lnri'ovmthat I, WALTER Gizsnsu, a citizen of the United. Stlaicea, and a vresident of Ardmore, Montf .going-ryeouxlty,` Pennsylvania, have' invented certain 'Improvements' in :Steam-Boiler Furnaces, of which the Hillen/ ing is a specification. A l invention relates to improvements in steam generators, and particularly to certain improvements intuitol lln iticstaking and smoke consuming devices for the; 'o fgsuch generators.'

-The"inljir'oa'fe'lnente in the sinking and smoke consliining devices Awhich I have constructed, are such regularin'tervals over the grate bars; effect aprelimicoking of such fuel upon cok'ing plates before it is,

onto the grate; consume the gases arising the coking operation My invention includes special means for'feeding 'the fuel from a hopper to the coking plate-:: and special I' mechanism foi-moving coking plates mi tharJJhe I fuel mayA bedischarged'thererom onto the grate bars.

Myv invention also includes special means of preheat' oi such ing theair and ieeding'fhe same, together with the gases generatedfby the colring ofthe fuel, at the point of the discharge of such fuel over the grate. lThe feed v h air is automatically regulated hy the speed' of tbe'stoking mechanism. Dill-r f ures of my invention will be more fully po 'reinaten' reference being had to-the ac- .l

Y camps .rn-g drawings, vin what;

: Fig. 4, is a sectional view similar to Fig. 1,

. chamber,

Eigur'e illustrates a longitudinal. section of my iinproved st eamj'boiler furnace, taken on the linea-a, Fig',-2; Fig.' vZifis a sectional elevation of the furnace taken on the line 64b, Fig. 1; Fig. 3, is a front elevationithe furnace chamber, showing tlJ' means'for driving the feeding and stoking apparatus; illustrating a'modied form of the structure, in which the furnace "cllainber is arranged within the boiler chamber, and

vbeneath. a portion of the tubes of the same; Fig, 5,is a' sectionalvie'w, similar to Fig. 2, illustrating a form of furnace chamber in which a double set of grate bars is used, and Figs. 6 and 7, are views illustrating details 'of the-invention. In the drawings, l represents an inclosing structure for the furnace which isshown'as' adjoining an inclosing structure 2 for a suitable form of boiler. 'In thev present instance, such boiler comprises lower mud 'drums f3 and upper steam drums 4; communication between these drums being afforded by pipes 5. In the furnace chamber a Wall or arch 8 is arranged, and

the'lgrate bars 9, supported in the present instance by'l and the subsequent burningo the .solid fuel, and automatically ake the fire as l and having the bottom side plates 1 8.4 This member or rocked across the .top

the cross bars l() and 11, are vdisposed so las to be inclined from' said wall' or arch toward the side Walls 12,

which latter incline toward the ash pit 13.

The apex of the wall or arch 8 is disposed 'between the lower drums fi and at a point just above the lower portion of the same, and this apex is grooved at 14' to receive the ends'` of the grate bars ;A such grooving` being of a depth to permitl the bars to' be' depressed at this end. so as to shake the same The grate bars 9 may rest on'botharch and side lwalls,

'in which case,,the crossbars 10 and 1l' may be dispensed with; or-tl1ey may rest on the lside walls and said bars 10 and 1 1, dispensing vyith'the-.central sup porting arch.

. Mounted on suitable spindles '15 which arefjournaled;

atv 16 in the viralls' of .the inclosing structure 1, .is a rockn ing member 17 of inverted T-shape incross' section,

17 is adapted to be Qscillated and thus automatically above this structureand partly inclosing the same is ay box-like hopper or casing-19, in" the which suitable conveying mcchanism'for the' fuel may arranged, or said hopper may be entirely open at the top,` and hand fed. lThis hopper 19 serves to supply the Tshaped member 17 with fuel.' The side .ex-

tensions 1 8 of this member serve as coking plates, while.

the upright Central portion acts as a shovel. Y .i A As 'a means of conveying the fuel, I .may use. an Archimedean scre'w 20 or other conveyer, such con-4 veyer leading from a hopper 2l-into which the fuel may bevdumped from an endless conveyer indicated at 22.

" This screw conveyer Works in a rotatable casi'pg23, journaled in the frontend rear ends of the casing 19,-

andthis rotatable casing 23 is provided with aflpngitudinal aperture 24, whereby the fuel carried inte the same by the screw 20, or other means, may be duniped at regular intervals onto the coking plates-'18 of he flshapedv rocking member 17.' duced-at the ends at4 25 so asto prevent any Alongitudinal movement of the same, androllers 26 are provided in order that its movement may For the purpose of rotating this gear whee127 on the end of the same,'which gear wheel may be driven from any suitable source oi power.

, The fuel after it has been dumped onto the coking This casing 23 isflre-l upper portion of be as easy as possible; casing 23,1 mount a. 'i

plates 18 of the rocking' member 17, remairisom said l plates within the casing 19 for ashort period of time,

be burned as this and being hetedby the productsof combustion ariscoked fuel is' discharged over the bed of the fire when the rocking member 17 is oscillatcd. In order to insure t perfect com bustion ot' such gases, I provide for the ad mission ol' :tir tothe furnace as the l'uel is discharged 'hy the plates 18, by arranging chambers 28 adjacent to the cnsingltl, such clnnnhers connuunicnting with the atmosphere. The air within said chambers being hunted as the [nel is coked onthe pint-es I8, such heated nir will he fed into the furnnce through the apertures 29, simultaneously with the discharge oi the fuel tliereiu.`

I provide special menus for oscillating the rocking member 17 nt regulan' intervals. which muy he predetcrminell, und l arrange the ends of the grato lmrs in thtl pnth of the eoking plates t8, so that als said plates und thoroughly agit-nte the rake of the tire. The fire will thus he kept clenn by the continual `linking of said grote lnu's.

ln Fig. ti, l have shown :t modilicd form ol rocking,r menther which is providedv with coking plates 1S" lmving ztllcrnnte side project ions :tud depressions' 30 und .'il. Hy this menus only the nllernnte gratte hairs will he ngitztted by the c okingtr plates 1 when the rocking ulclu'lter I7 has discharged the contents ol one'coking platte 'onto one side lol' the lire` the other colingY plnte ishrought into position to receiven supply ut' fuel tor the'opposite grote linrs. The parts are so arranged that. the screw couveyer 2() 4will carry :i proper quantity i fuel into the easing 23 during the rot-nt ion oi the sznuellxet-Ween the` times when its longitudinal aperture 24 is in position to discharge such l'uel, :nul the next supply of the lutter will be dropped onto the opposite'col-iiug plate 18. 'l'hod'ucl so disposed, undergoes the saune trentlnont as before. noted, and :it the proper timo` unid rocking lncml'tcr l? is moved so ns to dump `titte coal onto theopposite grat-cm4 such movement oi the'roeking member shaking the grote h'ars'nnd helping to clean the fire. l donot wislrto limit myn l' to `any particular mech :mism for oscillant ing or rot-king the member l2, but; iu ltigsflf, Stand 4, l lmvesho'wn mearns,iornccomplishing this'ohjnct; l I i t y 4Carried nt the out-side of the spindle lior said rocking member 17, is u lex-er 32,' having projectingpins 33 nl; its ends, such pins :rd-.tpted to 'slots 34 in the lower ends ol vertically movable lmls'vl. These lmnsnre guided in lunckets 3d mounted on the front w-.tll ofthe` furnace casing, und :tre moved-up and downl hy means ol time.

4 muy lle drivlV n together .n.ndlllmgezirings so timed thirtlf' -ltor the 'purpose ott-olli -tinh ynd.

,heat such boiler.

however, that th'eso Vchnnges do not atleet th 13 rat the bottom of the same, within which is mounted a screw conveyer for carrying away such sshes. This conveyor may load to any desired point, and may be driven hy any suitable, moans.

The screw 20 for conveying fuel to the mtntable ensing 23, may be driven from the mechanism for opemting the. shaking or oscillating member '17 :ind the rotating casing 23, or it may be. driven'hy any other suitable means. For the purpose of transmitting; such power, the shaft oi this conveyor carries :L gear or chain wh'eel 46.

in order-to permit the mounting of the conveyor screw 20 within the rotatable casing 23,' the' end 0f the casing is made in a separate piece 47, secured to: thov main portion hy set screws 48. To permit the'fuel from the hopper 21 to enter the cnsingvi, the latter is slotted M23, as clearly shown in Fig. 1. v

It will 'be understood, of course, that my improvdfv" l'urnace is capable o employment with various types of hottie plates for the purpose oi consuming Vthe gaseous portions of the products of combustion. A v l l prefer to `leed nir l:dfernntely to the :tir chambers 28 from the ntuiosphere, and in Fig. 7, l show a'damper or' vulve 53 iol' cutting ofi one of said chambers 25.5 'when I theothor is open to the atmosphere. By this means,

the chamber which is closed is tilting with heated nir during the cokiug operation on one of the plates 18, und when it'is desired to spread such coked fuel upon the grate lutrs, theI chnmherZB which hns been closed tothe atmosphere, will be opened und the hot air therein .will

be distributed, with the coked fuel, and thereby insureA are connected to s. suitable portion' ot" the 'mechanismfor oscillating the grate bars in order that. Asaid plate may ho moved buch-:ind forth. 'lo guido this plate, l plovide the ilnnged 'member 56 which may be secured. to the iront of the itu-nace iu any suitable umuner. i

'l`lie st.'1uctu1 e shown in Fig. 1, comprising a furnace und stoking-:tppnratus, is applicable to almost any verticitl tube-.boiler now in 4prese-ut. use, v:1nd muy he core nocted thereto nud when so connected, will servo to The structure of such furnaceund striking uppttrntus `is pructicztlly independent of the lioiler structure'.

boiler nre contained within it single huilt `up casino.

onwisliglit changes nreiunde in the meelmnism for opemt in;a the fuel feeding; nppztriun's, und the oscillul iop,r menti-rer Tying. the cokiug plntes.` `lt will ljo uiitlcrstoml., te'nlioii oitlio'nppurntus, :loin ull pther respects theju'leln on iik l erinctlythesimensthntoithcnluunnlus shown in Figll."

o illustri ed u torni o l t'urnuce i n which f ,V'l n For. 5, 1li-.w .dxtplet guilt,- hnrs. :trie used, i'our acts ot hors in all heilig shown,.lor-mingr lsubstantially two lire chambers. The

ln Fig. 1, however,l l have shown :L t structure in vwhich the furnace, stoking apparatus and 4ln tl'tisdorm of apparatus the lue'l is ledcutirely trom i vthrezircmt oi the ltlrunco through il. hopper 21'".

two central sets of grate bars are fed from a hopper 19' :it the bottom' of which is the usual'oscillating member as shown in Fig. 1, carrying the coking plates. The operation yot thin portion of the structure is substantially the same as thestructure shown in Fig'. 1, the usual air chambers shown at 28, with the apertures' 29, being also employed. In order ,to feed the sets' of Yside grate bers, however, I provide the oscillating members 17 having a'single coking plate 18". These members are driven from the same mechanism driving the member i7, but when the said coking plates are in engagenient with the' grate* bars esA shown at the right hond side oi Fig. 5, it is necessary to close the lower portion of the lioppers lilab and for this purpose I provide the curved extensions 24, which are carried by the inembers 17a. In.ths structure, all .of these oscillating members and coking plates'inay be operated es in the v 'other forms of the structure,

the;l only thing necessary being to duplicate e portion of such apparatusand provide suitable connections between said pints.

I do not wish to limit myself to the precise constructiones herein shown and described, out l Hoving thusdescribed my invention, I claim and desire to secure by Letters Patent: Y

1. The combination ln n furnace, of a series of grate bars, a fuel hopper ha'vlngn pair of outlets, n-nd an oscillating bottom fol'sald hopper for feeding fuel directly to said grate bars, said .bottom being so constructed-histo close one outlet of-the hopper while delivering fuel through the other outlet. I

` 2. The combination in n furnace, of iserles of movable grate bars, supportsfor said "grate bars,` und an oscillatingr member for feeding fuel tothe grate bars and oscillating said bars at the sn'me time.

3. The combination in a furnace. oi' two sets of moviible grate hars for'sepzlrateres, supports for sidrg'rnte bars, nud'nn oscillutingmember forv feeding fuel to said pirate bars zilternuicly, .said member erving also to oscillare the grle bars.

4. The combination in a furnace, of n sericsof inclined unile bnrs, supports for said bars so arranged :is to permit movement of the lutter at the upper portion oi the stime, and an oscili-.iting member'for feeding fuel to the grate bars, said membcrserving lso'to osciiiate said bars during' bars, a fuel hopper having,r u pzlir of ouilcts, zin oscillutng' I hottoiu for Suid 'hopper for i'coilln'g :italo hulls, supports for said hors for supplying' the fuelvfeeding operatie lhe cinbinution in dfurnace, of a series of inclined grate bars for sepurnte fires', "npports 'for Suid grate burs so arranged as to permit @movement of the latter ut the ntcly, siiid member serving also to oscilhiie enel set oligr lo bars during.,r thc luel icedingperotion.

6. The combination in :L furnace. of :i sezics oi' inclinerl grote bars for separate fil-cs, supports for said grote hars so arranged :le 'to permit; movement oi. the lutter ut the upper poriion ofy `the sume, und :i duplex oscilluliug member for feeding' fuel to the lires :illornntely. Suhl member serving; also io oscillflte each set of :.rralc hors during the i'u-'il feeding nperiliion.

- 'l1/The combination in :i fu'runcc, o`i.1 sol'ics of grato 'fuel lircctly to Suid grille bars. :imi continuouslyv operated uiofxns for supplying d hopper um! the verfilming bottom with incl. Suhl hoiiom being; .so constructed :ls to close ono outlet oi tho hopper while' delivering fuel through the other outioii.

8. 'lhe combin'zitlon in :i turmice,'oi' :l serios ol' movable so nrriiugcd -ns lo permit movement of the latter. an oscillating member l'or 1'( ling' i'ucl to .said lmiSfenld-meml'icr serving nlsoto contact. with und rock the from hui-.sl when tendini.r thc fuel. uml humus ,.id osrillning member willi iuol.

9. The combi ation in n furniicc, o i' a series of Lrzxlc bars', supports .fior sold here so zii-ranged :is io 'permit moveplete closure for the fuel outlet ot the hopper.

10. The-combination in :i furnace, of n series of grate oi the furnace whereby the iuel will be partially coked before it is fed io the grille bars, and provislon.for introducing air inl the furnrce simultuueously with the discharge of the purtially coked fuel over the grate bars, snld oscillating member acting in' certain positions as a com' plete closure for the fuel outlet of the hopper.

ll. 'ihe combination ln a turnace,.ot u puh' oi' combustion chambers, n 'hopper locted between said chambers, un oscillating bottom for combustion chambers, part of said hopper within the heat zone and in communlcation with .the atmosphere, und means for regulating the from said nir chambers, said -hopper strcted as to close one outlet ofthe ing'riuel4 through the other outlet.

12. The combination in n furnace, of n' pair of combustion chambers, a hopper located between said chambers, an oscillating bottom for to said bottom, means Tonoperating the same whereby :nel muy be fed to the combustion chambers alternately, said bottom. being so constructed as'to cut on? the outlet to one combustion chumber while'feeding tuel to the other, all" 'himmbers arranged nt the lower part of-the hopper within the heat zone, -said uir'chnmbers'cbmmunlcatlng with the atmosphere, and means for dellveringu supply of uir ostile fuel is: discharged into said combustion chunibers'.

13. The combination ,in n. fur'unce, of a `s'rise otnibw able inclined grate bora, supports-for scid hurs arranged to permit movement 'ot' the opposite endso1' vthe same in different directions, nn'oselllating member for" feeding-'fuel to said grate bars andfor rocklngthe sume, und u rotatable hopper in line with the oscillating membervfrfsupplylni.;I fuel thereto.

1 4. The combination in n furnace, of the grate Inu-s, il fuel' feeding hopper arranged above the furnhce chumbcr, u movable bottom for said hopper, side-extensions carried by said bottom and forming coking plates, means for deliverin.;r fuel onto said coking plats; and means for moving the bottom so us to' discharge the eoked tuelover thegrate bottom being so conhopper while deliveriol.' of the outlet.

:l movuhle bottom for said hopper, side extensions carried by said hopper :m'dfornilngcoking plates, means for delivcring fuo'l ontosnid coklng plates, means io'r .n'mvin'g-the bottom so us to discharge the 'coked fuel over the 'grate hn s.. snif] bottom being lot, ror' the hopper while delivering fuel through tho other the deposit. of the fuel. A

. 1G. The couihnution in u furnace,A of the grutes, u Incl mcmhor forming the bottom of said hopper, sideextonsions carried hy 'said oscillating.;r member andvtorming coking.: pluies, moans for deliver-inl.: fuel from the hopper tn sald hmmm. and nie-.uns im' oscillating the lutter sons to dischurn". the fuel over the siruclod :is lo close one outlet 0l' lue' i'llel 'lhrough the other outlet, .A

i7. 'lhecomhinollon in :i furnace, of 'i1 tendini: hopper urrnuur-d :el ihe conter ol.' the sume, u movable bottom for szriii hopper having sido extensions forming coking'plutes, u running 'cylinder nrrungeil ut. thcv upper part. of. sui-(l I hopper, menue {oi-.feeding fuel into said cylinder, means ,1 lor misil-1L; ihr, cylinder', und menus for oscillating. the l immuno hmmm ol' ihe feci! hopper, :will bottom acting l umior runnin :lundi-lions :is :i complete closure for the fucl l ouilul ol. the hopper, v:ill of suld parts combined to operate l :12. Nencini-:milled intervals;

the hopper willie deliverhars, un oscillating member for receiving und supplying f iuel to sold bars, said memberlying within the heat zone Y said hopper for feeding fuel to the air chambers adjacent the lower' supply vot airsdischnriged intoV the combustion clinmhers sold hopper, means: tor feeding fuel.

hors, said bottoni being so constructed as to close one outi 125 fuel feeding hopper arranged above the furnace chamber,

outlet, und means for supplying air simultaneously with hopper arranged :it/the center of'thc same, an osclllutlngfrate bars, said oscillating member actingr ln certain. positions us n comso constructed :1s to'c'loseone 'out gratos, said bottom belngso con- 1H. 'lh-z combination in u [urnu-u, 0i al series of cmnbusbottoni nell-ng :it times aus u cumplciv c'lnsure for the fuel 10 V l10n rlmmlwrs ihm-vin, :i [nel lmppor arranged within the outlet of the hopper.

I'urnm'u vliumlwr. un ulfwiilniingf imllum for said hopper, y "Hummm, Whemnn I have Signed 1m, mmm m this nir (-hmuhoiis in vmnmnnlcntinn with iliv :limuspiiere ul'- pwmmnon in me museum., i W0 subscribing wimess 5 ranma] alv thv lower puri nL' :mid hopper und opening into l l` (he cmninlstinn uhalmln-rs. imams fur feeding fuel to the ALLER GRAHAM `oscillating httom of lim imlipvr, nmchanism connected Witnesses:

iiierewith for nscillutiugsnir] hopper bottom, und mecham- Mummy C. Bowan, ism fur regulating iiic amount ui' air fed td the tires, Suid JUS, H. KLErN. 

